From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keir Fraser <keir.fraser@eu.citrix.com>
Subject: Re: [PATCH] x86/mm: disallow mmu hypercalls for a dying
	domain
Date: Fri, 27 Nov 2009 08:08:39 +0000
Message-ID: <C7353987.2E3B%keir.fraser@eu.citrix.com>
References: <7kocmoxz9p.fsf@pingu.sky.yk.fujitsu.co.jp>
Mime-Version: 1.0
Content-Type: text/plain;
	charset="US-ASCII"
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xensource.com>
In-Reply-To: <7kocmoxz9p.fsf@pingu.sky.yk.fujitsu.co.jp>
List-Unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xensource.com>
List-Help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-Subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
Sender: xen-devel-bounces@lists.xensource.com
Errors-To: xen-devel-bounces@lists.xensource.com
To: Kouya Shimura <kouya@jp.fujitsu.com>, "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
List-Id: xen-devel@lists.xenproject.org

Since the check is made with no locks held, I don't think any race can be
completely avoided here. I'm not sure the performance argument holds much
water either -- this just looks like a pointless extra check.

 -- Keir

On 27/11/2009 06:22, "Kouya Shimura" <kouya@jp.fujitsu.com> wrote:

> The race condition should be avoided for efficiency.
> 
> Signed-off-by: Kouya Shimura <kouya@jp.fujitsu.com>
>